- Selenium is a set of libraries that help us automate and interact 
  with the browsers.
  
  Why Selenium?
    - OPEN SOURCE -> FREE
    - It supports different types of browsers
    - It supports multiple different programming languages
    - Huge community behind it so
      many answers to any problems/questions
    - It can run on different Operaing systems
      such as: Mac, Windows, Linux etc.